Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3af967879852e4…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 16:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d5ed2fc6ef1e7e7afd28885720998721 SHA-1: f0e4e9f7adcbc581082871ddd03fa076b42330f0 SHA-256: 3c3af967879852e4bad1b2a8e28c7d4956f883f1e927b4dfe0a0de150827c906
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector domains, including one that impersonates Facebook and offers a "game hack" lure. This suggests a credential phishing or malicious redirection attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. No scripts were extracted, but the document structure and embedded URLs indicate a malicious intent to lead the user to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/get-more-free-spins-on-coin-master-game-hack.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/get-more-free-spins-on-coin-master-game-hack In PDF document text
    • http://ptts.pl/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004907.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4907 24812 bytes
SHA-256: 5a77fb2bd3c18e6028d63c06f7ec8d4d3ece887915d2b67b01921b22688cc245
font_01_sfnt_off000081ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 17884 bytes
SHA-256: bb9e4fd9c75f82cb5aaa6c3ce0f9987e8b81c815dbd48b4f27d4577a82c32b67

Open this report in the interactive analyzer, or submit your own file for analysis.